Published December 2004
| Version v1
Journal article
Phase transition behaviour in the A-site deficient perovskite oxide La1/3NbO3
- 1. Centre for Structural Chemistry and Biology, School of Chemistry, University of Sydney, F11, Sydney, New South Wales 2006 (Australia)
- 2. School of Physics, The University of Sydney, Sydney, New South Wales 2006 (Australia)
- 3. Australian Nuclear Science and Technology Organisation, Private Mail Bag 1, Menai, New South Wales 2234 (Australia)
- 4. Department of Environmental Sciences, Faculty of Science, Osaka Women's University, Daisen-cho 2-1, Sakai, Osaka 590-0035 (Japan)
- 5. Japan Synchrotron Radiation Research Institute, 1-1-1 Kouto, Mikazuki-cho, Sayo-gun, Hyogo 679-5198 (Japan)
Description
The crystal structure of the layered perovskite La1/3NbO3 has been studied between room temperature and 500oC using synchrotron X-ray powder diffraction methods. The structure shows ordering of the La cations at all temperatures. At room temperature La1/3NbO3 is orthorhombic with the NbO6 octahedra showing out-of-phase tilting about the a-axis. This tilting diminishes as the temperature increases, so that above 200oC the structure is tetragonal. The transition to the tetragonal structure is found to be continuous and analysis of the spontaneous strains shows it to be tricritical in nature
Additional details
Identifiers
- DOI
- 10.1016/j.jssc.2004.08.047;
- PII
- S0022-4596(04)00472-4;
Publishing Information
- Journal Title
- Journal of Solid State Chemistry
- Journal Volume
- 177
- Journal Issue
- 12
- Journal Page Range
- p. 4552-4556
- ISSN
- 0022-4596
- CODEN
- JSSCBI
INIS
- Country of Publication
- United States
- Country of Input or Organization
- International Atomic Energy Agency (IAEA)
- INIS RN
- 36097009
- Subject category
- S37: INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY;
- Descriptors DEI
- LANTHANUM COMPOUNDS; NIOBATES; ORTHORHOMBIC LATTICES; OXIDES; PEROVSKITE; PHASE TRANSFORMATIONS; TEMPERATURE RANGE 0273-0400 K; TETRAGONAL LATTICES; X-RAY DIFFRACTION
- Descriptors DEC
- CHALCOGENIDES; COHERENT SCATTERING; CRYSTAL LATTICES; CRYSTAL STRUCTURE; DIFFRACTION; MINERALS; NIOBIUM COMPOUNDS; OXIDE MINERALS; OXYGEN COMPOUNDS; PEROVSKITES; RARE EARTH COMPOUNDS; REFRACTORY METAL COMPOUNDS; SCATTERING; TEMPERATURE RANGE; TRANSITION ELEMENT COMPOUNDS
Optional Information
- Copyright
- Copyright (c) 2004 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.